main.qml Example File

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 ** This file is part of the QtSensors module of the Qt Toolkit.
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 import QtQuick 2.0
 import QtMobility.sensors 1.2

 Rectangle {
     width: 360
     height: 360
     id: mainPage

     Accelerometer {
         id: accel
         active:true
         property real accelY;
         property real accelX;
     }

     Timer {
          interval: 500; running: true; repeat: true

          property real xdiff;
          property real ydiff;

          onTriggered: {
              xdiff = accel.reading.x - accel.accelX;
              ydiff = accel.reading.y - accel.accelY;

              if (Math.abs(xdiff) > 0.3) {
                  accel.accelX = -accel.reading.x
              }
              if (Math.abs(ydiff) > 0.3) {
                  accel.accelY = accel.reading.y
              }
          }
      }

     Image {
         id: bubble
         source: "images/Bluebubble2.png"
         property real centerX: parent.width / 2
         property real centerY: parent.height / 2;
         property real bubbleCenter: bubble.width / 2

         function calX() {
             var newX = centerX + accel.accelX  / -1 * centerX

             if ((newX - bubbleCenter) < 0) {
                 return 0
             }
             else if ((newX + bubbleCenter) > parent.width) {
                 return parent.width - 2 * bubbleCenter
             }
             return newX - bubbleCenter;
         }
         x: calX();

         function calY() {
             var newY = centerY + accel.accelY / -1 * centerY

             if ((newY - bubbleCenter) < 0) {
                 return 0
             }
             else if ((newY + bubbleCenter) > parent.height) {
                 return parent.height - 2 * bubbleCenter
             }
             return newY - bubbleCenter;
         }
         y: calY();

         smooth: true

         Behavior on y {
             SmoothedAnimation {
                 easing.type: Easing.Linear
                 duration: 2500
             }
         }
         Behavior on x {
             SmoothedAnimation {
                 easing.type: Easing.Linear
                 duration: 2500
             }
         }
     }
 }